adding control blocks

docs/reference/control/in-background.md

@@ -2,7 +2,7 @@
 
 Run code in the background as a separate process or thread; for more information on this advanced construct, see [the micro:bit - a reactive system](/microbit/device/reactive).
 
-```
+```sig
 control.inBackground(() => {
 })
 ```
@@ -11,7 +11,7 @@ control.inBackground(() => {
 
 The example below shows how a background process can be used to display the current value of the global variable `num`, while code (like the `on button pressed` handler) can change the value of the variable.
 
-```
+```blocks
 let num = 0
 control.inBackground(() => {
     while (true) {
@@ -26,7 +26,7 @@ input.onButtonPressed("A", () => {
 
 The code below using the `forever` loop is equivalent to the code above
 
-```
+```blocks
 let num = 0
 basic.forever(() => {
     basic.showNumber(num, 150)
@@ -40,7 +40,7 @@ input.onButtonPressed("A", () => {
 
 If you have multiple processes that each show something on the LED screen, you may get unexpected results. Try, for example:
 
-```
+```blocks
 basic.forever(() => {
     basic.showNumber(6789, 150)
 })

libs/microbit/control.ts

@@ -1,13 +1,16 @@
+//% weight=1 color="#333333"
 namespace control {
     /**
      * Schedules code that run in the background.
-    //% help=control/in-background shim=micro_bit::runInBackground
      */
+    //% help=control/in-background shim=micro_bit::runInBackground
+    //% blockId="control_in_background" block="run in background"
     export function inBackground(body: Action): void { }
 
     /**
      * Resets the BBC micro:bit.
      */
     //% weight=1 shim=uBit.reset async help=control/reset
+    //% blockId="control_reset" block="reset"
     export function reset() : void { }
 }

libs/microbit/serial.ts

@@ -1,4 +1,4 @@
-//% weight=1
+//% weight=2
 namespace serial {
     /**
      * Prints a line of text to the serial